﻿using System.Windows.Forms;

namespace WinFormsApp_DragControls
{
    public class DragControl
    {
        //待拖动的控件
        private Control m_Control;
        //鼠标按下时的x，y坐标
        private int m_X;
        private int m_Y;
        public DragControl(Control control)
        {
            m_Control = control;
            m_Control.MouseDown += new MouseEventHandler(control_MouseDown);
            m_Control.MouseMove += new MouseEventHandler(contro_MouseMove);
        }
        private void control_MouseDown(object sender, MouseEventArgs e)
        {
            m_X = e.X;
            m_Y = e.Y;
        }
        private void contro_MouseMove(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
            {
                int x = e.X - m_X;
                int y = e.Y - m_Y;
                this.m_Control.Left += x;
                this.m_Control.Top += y;

            }
        }
    }
}
